IMO, there's a few reasons why Kinnard and Sheppard left UConn and think it has less to do with do with FHCRE and more to do with HCRA.
From press reports, scrimmage and spring game reviews, it was unlikely they were going to get any significant amount of playing time with the new HCPP, i.e. not going to be running with the ones. It's not because they weren't good athletes for their position, it's just that there was someone else ahead of them that was a little bit better. So when they decided to leave, what better place to go than to a school where it's more than likely they would be able to contribute right away, and that just happened to be Towson. It also helped that they were probably already familiar with the type of offense HCRA would be running or at least something resembling it. Then it's also important to remember that they'd both be closer to home. As for what sealed their decision to go to Towson. I can only speculate, but think it'd be pretty fair to assume that because HCRA had recruited them to go to UConn, a certain level of trust between coach and player had already been established. But most important - HCRA wanted them because he knew they were two talented players and they understood that.